Description

A total iron binding capacity (TIBC) blood test measures how well your blood carries iron. It can help diagnose iron deficiency anemia, iron overload, and other conditions. 

What does the test measure?

  • Transferrin: A protein produced by the liver that regulates iron absorption into the blood 
  • Iron: The amount of iron in your blood 

Why do you need the test?

  • A doctor may order a TIBC test if you have symptoms of iron deficiency or overload, such as fatigue, weakness, or pale skin 
  • A doctor may also order a TIBC test if you have a suspected iron poisoning, especially in children who have accidentally consumed too much iron 

What do the results mean? 

  • Iron deficiency: Low iron levels and high TIBC levels
  • Iron overload: High iron levels and low or normal TIBC levels
  • Liver disease: Low TIBC levels because the liver produces transferrin

Fasting not required.